FDNY Probie Manual Chapter 1 Chemistry of Fire Exam Questions With A+ Grade Answers!!

Flash Point - ANSWER-Temperature where liquid fuels give off enough vapors to ignite, but not enough to burn Heat - ANSWER-Form of energy that raises temperature measured by amount of work it does. Ignition Temperature - ANSWER-Minimum heat that a fuel in air must be heated to start a self-sustained combustion without a seperate ignition source Conduction - ANSWER-Movement of Heat from one body to another via direct contact. EG Metal touches Metal Convection - ANSWER-Movement of heat by movement of air or liquid Usually transfers up Radiation - ANSWER-Movement of heat via Infrared waves. EG the heat from the sun reaches us. Fire Tetrahedron - ANSWER-Temperature, Oxidizing agent, reducing agent, AND A self sustained chemical reaction Pyrolysis - ANSWER-Chemical decomposition of a solid fuel. EG gases emit from wood when burned. Vaporization - ANSWER-Process of turning liquid fuel into Gas. Oxygen required to Sustain Burn - ANSWER-16% Oxygen in air - ANSWER-21% Incipient Phase - ANSWER-First phase of a fire, fire is contained to original materials fire still producing water vapor. Steady-State Burning Phase - ANSWER-The Flame Spread phase fire has sufficient oxygen and fuel and fire is spreading